2.6.31-stable review patch. If anyone has any objections, please let us know.

------------------From: Jean Delvare <jdelvare@suse.de>

commit 14f03343ad1080c2fea29ab2c13f05b976c4584e upstream.

The message "ACPI: Device needs an ACPI driver" is misleading. Thedevice _may_ need an ACPI driver, if the BIOS implemented a customAPI for the device in question (which, AFAIK, can't be checked.) Ifnot, then either a generic ACPI driver may be used (for example"thermal"), or nothing can be done (other than a white list).

I propose to reword the message to:

ACPI: If an ACPI driver is available for this device, you should useit instead of the native driver

which I think is more correct. Comments and suggestions welcome.

I also added a message warning about possible problems and systeminstability when users pass acpi_enforce_resources=lax, as suggestedby Len.